Bangladesh Rice Research Institute. Rice Farming Systems Division & Ahmed, N. U. (1992). A review of BRRI cropping systems research, 1974-1988. Rice Farming Systems Division, Bangladesh Rice Research Institute.

Bangladesh Rice Research Institute. Rice Farming Systems Division and Nizam U. Ahmed. A Review of BRRI Cropping Systems Research, 1974-1988. Gazipur: Rice Farming Systems Division, Bangladesh Rice Research Institute, 1992.

Bangladesh Rice Research Institute. Rice Farming Systems Division and Nizam U. Ahmed. A Review of BRRI Cropping Systems Research, 1974-1988. Rice Farming Systems Division, Bangladesh Rice Research Institute, 1992.